1 /*
2  *
3  * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  *   - Redistributions of source code must retain the above copyright
10  *     notice, this list of conditions and the following disclaimer.
11  *
12  *   - Redistributions in binary form must reproduce the above copyright
13  *     notice, this list of conditions and the following disclaimer in the
14  *     documentation and/or other materials provided with the distribution.
15  *
16  *   - Neither the name of Oracle nor the names of its
17  *     contributors may be used to endorse or promote products derived
18  *     from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package java2d.demos.Colors;
33 
34 
35 import static java.awt.Color.black;
36 import static java.awt.Color.blue;
37 import static java.awt.Color.cyan;
38 import static java.awt.Color.green;
39 import static java.awt.Color.magenta;
40 import static java.awt.Color.orange;
41 import static java.awt.Color.pink;
42 import static java.awt.Color.red;
43 import static java.awt.Color.white;
44 import static java.awt.Color.yellow;
45 import java.awt.Color;
46 import java.awt.Font;
47 import java.awt.Graphics2D;
48 import java.awt.Image;
49 import java.awt.RenderingHints;
50 import java.awt.Shape;
51 import java.awt.color.ColorSpace;
52 import java.awt.font.FontRenderContext;
53 import java.awt.font.TextLayout;
54 import java.awt.geom.Rectangle2D;
55 import java.awt.image.BufferedImage;
56 import java.awt.image.ColorConvertOp;
57 import java2d.Surface;
58 
59 
60 /**
61  * ColorConvertOp a ColorSpace.TYPE_RGB BufferedImage to a ColorSpace.CS_GRAY
62  * BufferedImage.
63  */
64 @SuppressWarnings("serial")
65 public class ColorConvert extends Surface {
66 
67     private static Image img;
68     private static Color colors[] = { red, pink, orange,
69         yellow, green, magenta, cyan, blue };
70 
ColorConvert()71     public ColorConvert() {
72         setBackground(white);
73         img = getImage("clouds.jpg");
74     }
75 
76     @Override
render(int w, int h, Graphics2D g2)77     public void render(int w, int h, Graphics2D g2) {
78 
79         int iw = img.getWidth(this);
80         int ih = img.getHeight(this);
81         FontRenderContext frc = g2.getFontRenderContext();
82         Font font = g2.getFont();
83         g2.setColor(black);
84         TextLayout tl = new TextLayout("ColorConvertOp RGB->GRAY", font, frc);
85         tl.draw(g2, (float) (w / 2 - tl.getBounds().getWidth() / 2),
86                 tl.getAscent() + tl.getLeading());
87 
88         BufferedImage srcImg =
89                 new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
90         Graphics2D srcG = srcImg.createGraphics();
91         RenderingHints rhs = g2.getRenderingHints();
92         srcG.setRenderingHints(rhs);
93         srcG.drawImage(img, 0, 0, null);
94 
95         String s = "OpenJDK";
96         Font f = new Font(Font.SERIF, Font.BOLD, iw / 6);
97         tl = new TextLayout(s, f, frc);
98         Rectangle2D tlb = tl.getBounds();
99         char[] chars = s.toCharArray();
100         float charWidth = 0.0f;
101         int rw = iw / chars.length;
102         int rh = ih / chars.length;
103         for (int i = 0; i < chars.length; i++) {
104             tl = new TextLayout(String.valueOf(chars[i]), f, frc);
105             Shape shape = tl.getOutline(null);
106             srcG.setColor(colors[i % colors.length]);
107             tl.draw(srcG, (float) (iw / 2 - tlb.getWidth() / 2 + charWidth),
108                     (float) (ih / 2 + tlb.getHeight() / 2));
109             charWidth += (float) shape.getBounds().getWidth();
110             srcG.fillRect(i * rw, ih - rh, rw, rh);
111             srcG.setColor(colors[colors.length - 1 - i % colors.length]);
112             srcG.fillRect(i * rw, 0, rw, rh);
113         }
114 
115         ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
116         ColorConvertOp theOp = new ColorConvertOp(cs, rhs);
117 
118         BufferedImage dstImg =
119                 new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
120         theOp.filter(srcImg, dstImg);
121 
122         g2.drawImage(srcImg, 10, 20, w / 2 - 20, h - 30, null);
123         g2.drawImage(dstImg, w / 2 + 10, 20, w / 2 - 20, h - 30, null);
124     }
125 
main(String s[])126     public static void main(String s[]) {
127         createDemoFrame(new ColorConvert());
128     }
129 }
130